The HP/Agilent 44476A is a triple 1-to-2 microwave multiplexer module providing three independent SPDT 50-ohm coaxial relays for DC to 18 GHz signal routing. Each relay switches microwave signals with break-before-make action, delivering insertion loss below 0.05 dB and isolation exceeding 90 dB across the operating band. The module integrates three HP 33311B Option 011 latching solenoid switches with SMA terminal connectors, designed for integration into HP 3488A and 3499 Series mainframe systems.
Technical Specifications
• Configuration: Triple 1-to-2 multiplexers (three independent SPDT relays)
• Impedance: 50 Ω
• Frequency Range: DC to 18 GHz
• Insertion Loss: 90 dB to 18 GHz
• SWR: 1.40
• Switching Action: Break-before-make
• Coil Voltage: +5 V (HP 33311B Option 011)
• Repeatability: Typically 0.03 dB after 1,000,000 switchings
• Connectors: SMA terminal connectors
– Key Features
• Three independent signal paths eliminate cross-talk in multi-band routing applications
• Latching solenoid mechanism ensures stable switching with minimal thermal drift
• Internal coil contacts reduce power dissipation after switch actuation
• Rated for one million switching cycles with repeatable performance
• Internal 50 Ω termination prevents reflections
– Typical Applications
• Multi-band receiver and transmitter testing
• Microwave communication signal routing
• Aerospace and defense signal switching
• Laboratory and production test environments
– Compatibility & Integration
The 44476A is designed for HP 3488A Switch/Control Unit (Option 016) and 3499A/B/C mainframes. It operates under mainframe control, receiving switching commands and +5 V power from the host system.
